Health officials say the number of confirmed cases of mumps at Indiana University in Bloomington has reached 20 since February 12. One university spokesperson said the state's testing lab was closed at the end of last week due to Good Friday.
The IUMC has diagnosed 17 students with the mumps.
"The MMR is not 100% effective", said Dr. Beth Rupp, the medical director at the Indiana University Medical Center. Zero students came down with mumps in 2018. An outbreak is considered three confirmed cases and can occur at any time of the year, but often occur in the winter and spring. "You also have a lot of sharing of drinks, utensils, (and) of foods".
On Monday, the university was notifying students who live in close quarters with patients with mumps.
If students were exposed to mumps through dormitory living, classes or close contacts, they will be notified via email, she said.
IU officials set up a webpage for the campus community to learn about the mumps and the latest number of cases.
The fraternity isn't being identified because the university doesn't want students to target the fraternity or feel as if they have a false sense of security if they haven't been to its house, Rupp said.
"I would love to know which fraternity it is", said senior Jack Penniall. Among the first 19 cases, Rupp said 16 students have recovered while three remain in isolation.
"We also met with the executive board of the fraternity and encouraged them to cancel any social activities this semester".
IN is among the top 10 infected states so far this year.
Symptoms of mumps may include: Swelling and tenderness in front of and below one or both ears and along the jaw, pain along the jaw and in front of and below one or both ears, fever, tiredness, muscle aches and loss of appetite.
Symptoms of mumps generally appear more than two weeks after infection, and people with mumps typically recover in about two weeks, according to the CDC.